War intensifies amid Russia’s summer offensive. Ukraine has spotted a massive redeployment of Russian self-propelled artillery and air defense systems to Sumy Oblast. 

Ukrainian forces have recorded a large-scale transfer of Russian military equipment from Crimea and Kherson towards Sumy Oblast. According to Petro Andriushchenko, head of the Occupation Studies Center, this is the largest movement of weaponry in the past six months.

“More than 10 self-propelled artillery systems, air defense systems, and convoys of over 40 trucks carrying ammunition and personnel,” Andriushchenko says.

The equipment is being loaded onto trains and sent to Russia’s Kursk Oblast, effectively heading to Sumy. The Russians are now stationed approximately 25-30 km from it. If they reach the city’s border, they will use artillery to strike it. 

Special attention is drawn to the military equipment markings, which, with their dominant tactical symbol of a triangle within a triangle, indicate reinforcement of this specific direction.

Amid this buildup, Sumy faces heavy drone attacks. Konotop mayor Artem Semenikhin stated that on 8 June, the region endured the most powerful drone assault since the war began: “The entire sky over the region turned red with targets.”

Russia has reportedly lost a MiG-31 carrier of hypersonic Kinzhal missiles. On the night of 9 June, Ukraine carried out a precise strike on the Savasleyka airfield in Russia’s Nizhny Novgorod Oblast.

The Savasleyka airfield has been frequently used to organize strikes against Ukrainian territory.

Therefore, destroying these aircraft is a serious blow to Russia’s ability to conduct missile attacks with hypersonic weapons.

According to the General Staff of the Armed Forces of Ukraine, as a result of the operation, at least two Russian aircraft were hit, most likely MiG-31 and Su-30/34 jets. Information is being updated and clarified.

Ukrainian military officials emphasize that such operations are part of a comprehensive strategy to reduce the enemy’s capacity to carry out air attacks on Ukraine.

The General Staff states that strikes on targets enabling Russian aggression will continue until the war is completely stopped.

Editor's note: This article has been updated with comments by Serbian President Aleksandar Vucic.

Serbian President Aleksandar Vucic on May 29 denied Russian foreign intelligence (SVR) claims that Serbian defense enterprises continue to supply ammunition to Ukraine, despite Belgrade's stated neutrality.

"The Serbian defense industry is trying to shoot Russia in the back," the agency's statement read.

The Serbian government has maintained friendly ties with Russia under Vucic, who has denied previous claims of Serbian arms supplies to Ukraine.

Belgrade has positioned itself as neutral in the Russia-Ukraine war, striving to balance its position as an EU candidate with its long-standing relationship with Moscow.

Russian intelligence accused Serbian companies of funneling arms to Ukraine via third-party intermediaries, namely NATO countries like Czechia, Poland, and Bulgaria.

"More recently, exotic options involving African countries have also been used for this purpose," the report claimed.

The Serbian contribution amounts to "hundreds of thousands of shells for multiple-launch rocket systems and howitzers, as well as a million small arms sounds," according to the intelligence report.

The Kyiv Independent could not independently verify the claims made by Russian officials.

Later on May 29, Vucic denied the allegations made by Russian intelligence, saying that some of the claims are not true.

"For example, they correctly say that there is a contract with the Czech Republic. But no permission was given, and none of the missiles were delivered" to Ukraine, Vucic told Serbian outlet RTS.

"We have formed a working group, together with Russian partners, to establish the facts... we work only for Serbia," he added.

The Financial Times reported in June 2024 that Serbian ammunition worth $855 million has made its way indirectly to Ukraine.

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